There is no end to the cool things you can do with fire. Most of these things shouldn’t be done, especially not indoors, but if you have the time, the know-how, and a slight bent towards pyromania, then there are any number of projects you can try. This one, known as the Pyro Board, might be the coolest.

The Pyro Board is a grid of 2500 flames which are computer-controlled and can be manipulated using sound waves. Vritasium’s video explains everything you need to know while delivering some amazing eye candy.

The Pyro Board, is a high-tech flame table, something you’ve likely seen before if you’ve spend enough time on YouTube. It happens to be a particularly well designed flame table, but the concepts are the same.

And speaking of the concept, the idea behind all these contraptions is that of the Rubens’ Tube, or as it’s more popularly known, a flame tube. These are normally used in physics classrooms, so you’re excused if you haven’t seen one in a few years, but the point is that they show the effect of sound waves on the air. Air can be rather difficult to see so the flames serve as a proxy for that, with their movement giving the viewer a demonstration of the sound pressure inside the tube — the higher the flame’s height the greater the pressure pushing it out of the tube. Because of this, you can see the waveform based on the height of the flames, just as you can see the wavelength by measuring peak to peak.

The Pyro Board is a planar version of the Rubens’ Tube combined with the concept that “more fire is always better.” Based on what we see in the video, it’s an idea that’s hard to argue with.